sa11x0_com.c revision 1.41
1 /* $NetBSD: sa11x0_com.c,v 1.41 2007/11/19 18:51:38 ad Exp $ */ 2 3 /*- 4 * Copyright (c) 1998, 1999, 2001 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by IWAMOTO Toshihiro. 9 * 10 * This code is derived from software contributed to The NetBSD Foundation 11 * by Charles M. Hannum. 12 * 13 * Redistribution and use in source and binary forms, with or without 14 * modification, are permitted provided that the following conditions 15 * are met: 16 * 1. Redistributions of source code must retain the above copyright 17 * notice, this list of conditions and the following disclaimer. 18 * 2. Redistributions in binary form must reproduce the above copyright 19 * notice, this list of conditions and the following disclaimer in the 20 * documentation and/or other materials provided with the distribution. 21 * 3. All advertising materials mentioning features or use of this software 22 * must display the following acknowledgement: 23 * This product includes software developed by the NetBSD 24 * Foundation, Inc. and its contributors. 25 * 4. Neither the name of The NetBSD Foundation nor the names of its 26 * contributors may be used to endorse or promote products derived 27 * from this software without specific prior written permission. 28 * 29 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 30 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 31 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 32 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 33 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 34 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 35 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 36 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 37 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 38 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 39 * POSSIBILITY OF SUCH DAMAGE. 40 */ 41 42 /* 43 * Copyright (c) 1991 The Regents of the University of California. 44 * All rights reserved. 45 * 46 * Redistribution and use in source and binary forms, with or without 47 * modification, are permitted provided that the following conditions 48 * are met: 49 * 1. Redistributions of source code must retain the above copyright 50 * notice, this list of conditions and the following disclaimer. 51 * 2. Redistributions in binary form must reproduce the above copyright 52 * notice, this list of conditions and the following disclaimer in the 53 * documentation and/or other materials provided with the distribution. 54 * 3. Neither the name of the University nor the names of its contributors 55 * may be used to endorse or promote products derived from this software 56 * without specific prior written permission. 57 * 58 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 59 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 60 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 61 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 62 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 63 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 64 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 65 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 66 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 67 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 68 * SUCH DAMAGE. 69 * 70 * @(#)com.c 7.5 (Berkeley) 5/16/91 71 */ 72 73 #include <sys/cdefs.h> 74 __KERNEL_RCSID(0, "$NetBSD: sa11x0_com.c,v 1.41 2007/11/19 18:51:38 ad Exp $"); 75 76 #include "opt_com.h" 77 #include "opt_ddb.h" 78 #include "opt_ddbparam.h" 79 #include "opt_kgdb.h" 80 #include "opt_multiprocessor.h" 81 #include "opt_lockdebug.h" 82 83 #include "rnd.h" 84 #if NRND > 0 && defined(RND_COM) 85 #include <sys/rnd.h> 86 #endif 87 88 #include <sys/param.h> 89 #include <sys/systm.h> 90 #include <sys/types.h> 91 #include <sys/conf.h> 92 #include <sys/file.h> 93 #include <sys/device.h> 94 #include <sys/kernel.h> 95 #include <sys/malloc.h> 96 #include <sys/tty.h> 97 #include <sys/uio.h> 98 #include <sys/vnode.h> 99 #include <sys/kauth.h> 100 101 #include <dev/cons.h> 102 103 #include <machine/bus.h> 104 #include <arm/sa11x0/sa11x0_reg.h> 105 #include <arm/sa11x0/sa11x0_var.h> 106 #include <arm/sa11x0/sa11x0_comreg.h> 107 #include <arm/sa11x0/sa11x0_comvar.h> 108 #include <arm/sa11x0/sa11x0_gpioreg.h> 109 110 #ifdef hpcarm 111 #include <hpc/include/platid.h> 112 #include <hpc/include/platid_mask.h> 113 #endif 114 115 #include "sacom.h" 116 117 dev_type_open(sacomopen); 118 dev_type_close(sacomclose); 119 dev_type_read(sacomread); 120 dev_type_write(sacomwrite); 121 dev_type_ioctl(sacomioctl); 122 dev_type_stop(sacomstop); 123 dev_type_tty(sacomtty); 124 dev_type_poll(sacompoll); 125 126 const struct cdevsw sacom_cdevsw = { 127 sacomopen, sacomclose, sacomread, sacomwrite, sacomioctl, 128 sacomstop, sacomtty, sacompoll, nommap, ttykqfilter, D_TTY 129 }; 130 131 static int sacom_match(struct device *, struct cfdata *, void *); 132 static void sacom_attach(struct device *, struct device *, void *); 133 static void sacom_filltx(struct sacom_softc *); 134 static void sacom_attach_subr(struct sacom_softc *); 135 #if defined(DDB) || defined(KGDB) 136 static void sacom_enable_debugport(struct sacom_softc *); 137 #endif 138 int sacom_detach(struct device *, int); 139 void sacom_config(struct sacom_softc *); 140 int sacom_activate(struct device *, enum devact); 141 void sacom_shutdown(struct sacom_softc *); 142 static u_int cflag2cr0(tcflag_t); 143 int sacomparam(struct tty *, struct termios *); 144 void sacomstart(struct tty *); 145 int sacomhwiflow(struct tty *, int); 146 147 void sacom_loadchannelregs(struct sacom_softc *); 148 void sacom_hwiflow(struct sacom_softc *); 149 void sacom_break(struct sacom_softc *, int); 150 void sacom_modem(struct sacom_softc *, int); 151 void tiocm_to_sacom(struct sacom_softc *, u_long, int); 152 int sacom_to_tiocm(struct sacom_softc *); 153 void sacom_iflush(struct sacom_softc *); 154 155 int sacominit(bus_space_tag_t, bus_addr_t, int, tcflag_t, 156 bus_space_handle_t *); 157 int sacom_is_console(bus_space_tag_t, bus_addr_t, 158 bus_space_handle_t *); 159 160 void sacomsoft(void *); 161 162 static inline void sacom_rxsoft(struct sacom_softc *, struct tty *); 163 static inline void sacom_txsoft(struct sacom_softc *, struct tty *); 164 static inline void sacom_stsoft(struct sacom_softc *, struct tty *); 165 static inline void sacom_schedrx(struct sacom_softc *); 166 167 #ifdef hpcarm 168 /* HPCARM specific functions */ 169 static void sacom_j720_init(struct sa11x0_softc *, struct sacom_softc *); 170 #endif 171 172 #define COMUNIT_MASK 0x7ffff 173 #define COMDIALOUT_MASK 0x80000 174 175 #define COMUNIT(x) (minor(x) & COMUNIT_MASK) 176 #define COMDIALOUT(x) (minor(x) & COMDIALOUT_MASK) 177 178 #define COM_ISALIVE(sc) ((sc)->enabled != 0 && \ 179 device_is_active(&(sc)->sc_dev)) 180 181 #define COM_BARRIER(t, h, f) bus_space_barrier((t), (h), 0, COM_NPORTS, (f)) 182 #define COM_LOCK(sc) 183 #define COM_UNLOCK(sc) 184 185 int sacomintr(void *); 186 int sacomcngetc(dev_t); 187 void sacomcnputc(dev_t, int); 188 void sacomcnpollc(dev_t, int); 189 190 void sacomcnprobe(struct consdev *); 191 void sacomcninit(struct consdev *); 192 193 extern struct bus_space sa11x0_bs_tag; 194 195 static bus_space_tag_t sacomconstag; 196 static bus_space_handle_t sacomconsioh; 197 static bus_addr_t sacomconsaddr = SACOM3_BASE; /* XXX */ 198 199 static int sacomconsattached; 200 static int sacomconsrate; 201 static tcflag_t sacomconscflag; 202 203 CFATTACH_DECL(sacom, sizeof(struct sacom_softc), 204 sacom_match, sacom_attach, NULL, NULL); 205 extern struct cfdriver sacom_cd; 206 207 #ifdef hpcarm 208 struct platid_data sacom_platid_table[] = { 209 { &platid_mask_MACH_HP_JORNADA_7XX, sacom_j720_init }, 210 { NULL, NULL } 211 }; 212 #endif 213 214 struct consdev sacomcons = { 215 NULL, NULL, sacomcngetc, sacomcnputc, sacomcnpollc, NULL, 216 NULL, NULL, NODEV, CN_NORMAL 217 }; 218 219 #ifndef CONMODE 220 #define CONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB | PARENB)) | CS8) /* 8N1 */ 221 #endif 222 #ifndef CONSPEED 223 #define CONSPEED 9600 224 #endif 225 #ifndef CONADDR 226 #define CONADDR SACOM3_BASE 227 #endif 228 229 static int 230 sacom_match(struct device *parent, struct cfdata *match, void *aux) 231 { 232 233 return 1; 234 } 235 236 void 237 sacom_attach(struct device *parent, struct device *self, void *aux) 238 { 239 struct sacom_softc *sc = (struct sacom_softc*)self; 240 struct sa11x0_attach_args *sa = aux; 241 242 #ifdef hpcarm 243 struct platid_data *p; 244 void (*mdinit)(struct device *, struct sacom_softc *); 245 #endif 246 247 printf("\n"); 248 249 sc->sc_iot = sa->sa_iot; 250 sc->sc_baseaddr = sa->sa_addr; 251 252 if (bus_space_map(sa->sa_iot, sa->sa_addr, sa->sa_size, 0, 253 &sc->sc_ioh)) { 254 printf("%s: unable to map registers\n", sc->sc_dev.dv_xname); 255 return; 256 } 257 258 printf("%s: ", sc->sc_dev.dv_xname); 259 switch (sc->sc_baseaddr) { 260 case SACOM1_BASE: 261 printf("SA-11x0 UART1\n"); 262 break; 263 case SACOM2_BASE: 264 printf("SA-11x0 UART2 (IRDA)\n"); 265 break; 266 case SACOM3_BASE: 267 printf("SA-11x0 UART3\n"); 268 break; 269 default: 270 printf("unknown SA-11x0 UART\n"); 271 break; 272 } 273 274 sacom_attach_subr(sc); 275 276 #ifdef hpcarm 277 /* Do hpcarm specific initialization, if any */ 278 if ((p = platid_search_data(&platid, sacom_platid_table)) != NULL) { 279 mdinit = p->data; 280 (mdinit)(parent, sc); 281 } 282 #endif 283 284 sa11x0_intr_establish(0, sa->sa_intr, 1, IPL_SERIAL, sacomintr, sc); 285 } 286 287 void 288 sacom_attach_subr(struct sacom_softc *sc) 289 { 290 bus_addr_t iobase = sc->sc_baseaddr; 291 bus_space_tag_t iot = sc->sc_iot; 292 struct tty *tp; 293 294 /* XXX Do we need to disable interrupts here? */ 295 296 if (iot == sacomconstag && iobase == sacomconsaddr) { 297 sacomconsattached = 1; 298 sc->sc_speed = SACOMSPEED(sacomconsrate); 299 300 /* Make sure the console is always "hardwired". */ 301 delay(10000); /* wait for output to finish */ 302 SET(sc->sc_hwflags, COM_HW_CONSOLE); 303 SET(sc->sc_swflags, TIOCFLAG_SOFTCAR); 304 } 305 306 tp = ttymalloc(); 307 tp->t_oproc = sacomstart; 308 tp->t_param = sacomparam; 309 tp->t_hwiflow = sacomhwiflow; 310 311 sc->sc_tty = tp; 312 sc->sc_rbuf = malloc(SACOM_RING_SIZE << 1, M_DEVBUF, M_NOWAIT); 313 sc->sc_rbput = sc->sc_rbget = sc->sc_rbuf; 314 sc->sc_rbavail = SACOM_RING_SIZE; 315 if (sc->sc_rbuf == NULL) { 316 printf("%s: unable to allocate ring buffer\n", 317 sc->sc_dev.dv_xname); 318 return; 319 } 320 sc->sc_ebuf = sc->sc_rbuf + (SACOM_RING_SIZE << 1); 321 sc->sc_tbc = 0; 322 323 tty_attach(tp); 324 325 if (ISSET(sc->sc_hwflags, COM_HW_CONSOLE)) { 326 int maj; 327 328 /* locate the major number */ 329 maj = cdevsw_lookup_major(&sacom_cdevsw); 330 331 cn_tab->cn_dev = makedev(maj, device_unit(&sc->sc_dev)); 332 333 delay(10000); /* XXX */ 334 printf("%s: console\n", sc->sc_dev.dv_xname); 335 delay(10000); /* XXX */ 336 } 337 338 339 sc->sc_si = softintr_establish(IPL_SOFTSERIAL, sacomsoft, sc); 340 341 #if NRND > 0 && defined(RND_COM) 342 rnd_attach_source(&sc->rnd_source, sc->sc_dev.dv_xname, 343 RND_TYPE_TTY, 0); 344 #endif 345 346 /* if there are no enable/disable functions, assume the device 347 is always enabled */ 348 if (!sc->enable) 349 sc->enabled = 1; 350 351 sacom_config(sc); 352 353 SET(sc->sc_hwflags, COM_HW_DEV_OK); 354 } 355 356 /* This is necessary when dynamically changing SAIP configuration. */ 357 int 358 sacom_detach(struct device *self, int flags) 359 { 360 struct sacom_softc *sc = (struct sacom_softc *)self; 361 int maj, mn; 362 363 /* locate the major number */ 364 maj = cdevsw_lookup_major(&sacom_cdevsw); 365 366 /* Nuke the vnodes for any open instances. */ 367 mn = device_unit(self); 368 vdevgone(maj, mn, mn, VCHR); 369 370 mn |= COMDIALOUT_MASK; 371 vdevgone(maj, mn, mn, VCHR); 372 373 /* Free the receive buffer. */ 374 free(sc->sc_rbuf, M_DEVBUF); 375 376 /* Detach and free the tty. */ 377 tty_detach(sc->sc_tty); 378 ttyfree(sc->sc_tty); 379 380 /* Unhook the soft interrupt handler. */ 381 softintr_disestablish(sc->sc_si); 382 383 #if NRND > 0 && defined(RND_COM) 384 /* Unhook the entropy source. */ 385 rnd_detach_source(&sc->rnd_source); 386 #endif 387 388 return 0; 389 } 390 391 void 392 sacom_config(struct sacom_softc *sc) 393 { 394 bus_space_tag_t iot = sc->sc_iot; 395 bus_space_handle_t ioh = sc->sc_ioh; 396 397 /* Disable engine before configuring the device. */ 398 sc->sc_cr3 = 0; 399 bus_space_write_4(iot, ioh, SACOM_CR3, sc->sc_cr3); 400 401 #ifdef DDB 402 if (ISSET(sc->sc_hwflags, COM_HW_CONSOLE)) 403 sacom_enable_debugport(sc); 404 #endif 405 } 406 407 #ifdef DDB 408 static void 409 sacom_enable_debugport(struct sacom_softc *sc) 410 { 411 bus_space_tag_t iot = sc->sc_iot; 412 bus_space_handle_t ioh = sc->sc_ioh; 413 int s; 414 415 s = splserial(); 416 COM_LOCK(sc); 417 sc->sc_cr3 = CR3_RXE | CR3_TXE; 418 bus_space_write_4(iot, ioh, SACOM_CR3, sc->sc_cr3); 419 COM_UNLOCK(sc); 420 splx(s); 421 } 422 #endif 423 424 int 425 sacom_activate(struct device *self, enum devact act) 426 { 427 struct sacom_softc *sc = (struct sacom_softc *)self; 428 int s, rv = 0; 429 430 s = splserial(); 431 COM_LOCK(sc); 432 switch (act) { 433 case DVACT_ACTIVATE: 434 rv = EOPNOTSUPP; 435 break; 436 437 case DVACT_DEACTIVATE: 438 if (sc->sc_hwflags & (COM_HW_CONSOLE|COM_HW_KGDB)) { 439 rv = EBUSY; 440 break; 441 } 442 443 if (sc->disable != NULL && sc->enabled != 0) { 444 (*sc->disable)(sc); 445 sc->enabled = 0; 446 } 447 break; 448 } 449 450 COM_UNLOCK(sc); 451 splx(s); 452 return rv; 453 } 454 455 void 456 sacom_shutdown(struct sacom_softc *sc) 457 { 458 struct tty *tp = sc->sc_tty; 459 int s; 460 461 s = splserial(); 462 COM_LOCK(sc); 463 464 /* Clear any break condition set with TIOCSBRK. */ 465 sacom_break(sc, 0); 466 467 /* 468 * Hang up if necessary. Wait a bit, so the other side has time to 469 * notice even if we immediately open the port again. 470 * Avoid tsleeping above splhigh(). 471 */ 472 if (ISSET(tp->t_cflag, HUPCL)) { 473 sacom_modem(sc, 0); 474 COM_UNLOCK(sc); 475 splx(s); 476 /* XXX tsleep will only timeout */ 477 (void) tsleep(sc, TTIPRI, ttclos, hz); 478 s = splserial(); 479 COM_LOCK(sc); 480 } 481 482 /* Turn off interrupts. */ 483 sc->sc_cr3 = 0; 484 bus_space_write_4(sc->sc_iot, sc->sc_ioh, SACOM_CR3, sc->sc_cr3); 485 486 if (sc->disable) { 487 #ifdef DIAGNOSTIC 488 if (!sc->enabled) 489 panic("sacom_shutdown: not enabled?"); 490 #endif 491 (*sc->disable)(sc); 492 sc->enabled = 0; 493 } 494 COM_UNLOCK(sc); 495 splx(s); 496 } 497 498 int 499 sacomopen(dev_t dev, int flag, int mode, struct lwp *l) 500 { 501 struct sacom_softc *sc; 502 struct tty *tp; 503 int s, s2; 504 int error; 505 506 sc = device_lookup(&sacom_cd, COMUNIT(dev)); 507 if (sc == NULL || !ISSET(sc->sc_hwflags, COM_HW_DEV_OK) || 508 sc->sc_rbuf == NULL) 509 return ENXIO; 510 511 if (!device_is_active(&sc->sc_dev)) 512 return ENXIO; 513 514 tp = sc->sc_tty; 515 516 if (kauth_authorize_device_tty(l->l_cred, KAUTH_DEVICE_TTY_OPEN, tp)) 517 return (EBUSY); 518 519 s = spltty(); 520 521 /* 522 * Do the following iff this is a first open. 523 */ 524 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) { 525 struct termios t; 526 527 tp->t_dev = dev; 528 529 s2 = splserial(); 530 COM_LOCK(sc); 531 532 if (sc->enable) { 533 if ((*sc->enable)(sc)) { 534 COM_UNLOCK(sc); 535 splx(s2); 536 splx(s); 537 printf("%s: device enable failed\n", 538 sc->sc_dev.dv_xname); 539 return EIO; 540 } 541 sc->enabled = 1; 542 sacom_config(sc); 543 } 544 545 /* Turn on interrupts. */ 546 sc->sc_cr3 = CR3_RXE | CR3_TXE | CR3_RIE | CR3_TIE; 547 bus_space_write_4(sc->sc_iot, sc->sc_ioh, SACOM_CR3, 548 sc->sc_cr3); 549 550 551 COM_UNLOCK(sc); 552 splx(s2); 553 554 /* 555 * Initialize the termios status to the defaults. Add in the 556 * sticky bits from TIOCSFLAGS. 557 */ 558 t.c_ispeed = 0; 559 if (ISSET(sc->sc_hwflags, COM_HW_CONSOLE)) { 560 t.c_ospeed = sacomconsrate; 561 t.c_cflag = sacomconscflag; 562 } else { 563 t.c_ospeed = TTYDEF_SPEED; 564 t.c_cflag = TTYDEF_CFLAG; 565 } 566 if (ISSET(sc->sc_swflags, TIOCFLAG_CLOCAL)) 567 SET(t.c_cflag, CLOCAL); 568 if (ISSET(sc->sc_swflags, TIOCFLAG_CRTSCTS)) 569 SET(t.c_cflag, CRTSCTS); 570 if (ISSET(sc->sc_swflags, TIOCFLAG_MDMBUF)) 571 SET(t.c_cflag, MDMBUF); 572 /* Make sure sacomparam() will do something. */ 573 tp->t_ospeed = 0; 574 (void) sacomparam(tp, &t); 575 tp->t_iflag = TTYDEF_IFLAG; 576 tp->t_oflag = TTYDEF_OFLAG; 577 tp->t_lflag = TTYDEF_LFLAG; 578 ttychars(tp); 579 ttsetwater(tp); 580 581 s2 = splserial(); 582 COM_LOCK(sc); 583 584 /* 585 * Turn on DTR. We must always do this, even if carrier is not 586 * present, because otherwise we'd have to use TIOCSDTR 587 * immediately after setting CLOCAL, which applications do not 588 * expect. We always assert DTR while the device is open 589 * unless explicitly requested to deassert it. 590 */ 591 sacom_modem(sc, 1); 592 593 /* Clear the input ring, and unblock. */ 594 sc->sc_rbput = sc->sc_rbget = sc->sc_rbuf; 595 sc->sc_rbavail = SACOM_RING_SIZE; 596 sacom_iflush(sc); 597 CLR(sc->sc_rx_flags, RX_ANY_BLOCK); 598 sacom_hwiflow(sc); 599 600 #ifdef COM_DEBUG 601 if (sacom_debug) 602 comstatus(sc, "sacomopen "); 603 #endif 604 605 COM_UNLOCK(sc); 606 splx(s2); 607 } 608 609 splx(s); 610 611 error = ttyopen(tp, COMDIALOUT(dev), ISSET(flag, O_NONBLOCK)); 612 if (error) 613 goto bad; 614 615 error = (*tp->t_linesw->l_open)(dev, tp); 616 if (error) 617 goto bad; 618 619 return 0; 620 621 bad: 622 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) { 623 /* 624 * We failed to open the device, and nobody else had it opened. 625 * Clean up the state as appropriate. 626 */ 627 sacom_shutdown(sc); 628 } 629 630 return error; 631 } 632 633 int 634 sacomclose(dev_t dev, int flag, int mode, struct lwp *l) 635 { 636 struct sacom_softc *sc = device_lookup(&sacom_cd, COMUNIT(dev)); 637 struct tty *tp = sc->sc_tty; 638 639 /* XXX This is for cons.c. */ 640 if (!ISSET(tp->t_state, TS_ISOPEN)) 641 return 0; 642 643 (*tp->t_linesw->l_close)(tp, flag); 644 ttyclose(tp); 645 646 if (COM_ISALIVE(sc) == 0) 647 return 0; 648 649 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) { 650 /* 651 * Although we got a last close, the device may still be in 652 * use; e.g. if this was the dialout node, and there are still 653 * processes waiting for carrier on the non-dialout node. 654 */ 655 sacom_shutdown(sc); 656 } 657 658 return 0; 659 } 660 661 int 662 sacomread(dev_t dev, struct uio *uio, int flag) 663 { 664 struct sacom_softc *sc = device_lookup(&sacom_cd, COMUNIT(dev)); 665 struct tty *tp = sc->sc_tty; 666 667 if (COM_ISALIVE(sc) == 0) 668 return EIO; 669 670 return (*tp->t_linesw->l_read)(tp, uio, flag); 671 } 672 673 int 674 sacomwrite(dev_t dev, struct uio *uio, int flag) 675 { 676 struct sacom_softc *sc = device_lookup(&sacom_cd, COMUNIT(dev)); 677 struct tty *tp = sc->sc_tty; 678 679 if (COM_ISALIVE(sc) == 0) 680 return EIO; 681 682 return (*tp->t_linesw->l_write)(tp, uio, flag); 683 } 684 685 int 686 sacompoll(dev_t dev, int events, struct lwp *l) 687 { 688 struct sacom_softc *sc = device_lookup(&sacom_cd, COMUNIT(dev)); 689 struct tty *tp = sc->sc_tty; 690 691 if (COM_ISALIVE(sc) == 0) 692 return EIO; 693 694 return (*tp->t_linesw->l_poll)(tp, events, l); 695 } 696 697 struct tty * 698 sacomtty(dev_t dev) 699 { 700 struct sacom_softc *sc = device_lookup(&sacom_cd, COMUNIT(dev)); 701 struct tty *tp = sc->sc_tty; 702 703 return tp; 704 } 705 706 int 707 sacomioctl(dev_t dev, u_long cmd, void *data, int flag, struct lwp *l) 708 { 709 struct sacom_softc *sc = device_lookup(&sacom_cd, COMUNIT(dev)); 710 struct tty *tp = sc->sc_tty; 711 int error; 712 int s; 713 714 if (COM_ISALIVE(sc) == 0) 715 return EIO; 716 717 error = (*tp->t_linesw->l_ioctl)(tp, cmd, data, flag, l); 718 if (error != EPASSTHROUGH) 719 return error; 720 721 error = ttioctl(tp, cmd, data, flag, l); 722 if (error != EPASSTHROUGH) 723 return error; 724 725 error = 0; 726 727 s = splserial(); 728 COM_LOCK(sc); 729 730 switch (cmd) { 731 case TIOCSBRK: 732 sacom_break(sc, 1); 733 break; 734 735 case TIOCCBRK: 736 sacom_break(sc, 0); 737 break; 738 739 case TIOCSDTR: 740 sacom_modem(sc, 1); 741 break; 742 743 case TIOCCDTR: 744 sacom_modem(sc, 0); 745 break; 746 747 case TIOCGFLAGS: 748 *(int *)data = sc->sc_swflags; 749 break; 750 751 case TIOCSFLAGS: 752 error = kauth_authorize_device_tty(l->l_cred, 753 KAUTH_DEVICE_TTY_PRIVSET, tp); 754 if (error) 755 break; 756 sc->sc_swflags = *(int *)data; 757 break; 758 759 case TIOCMSET: 760 case TIOCMBIS: 761 case TIOCMBIC: 762 tiocm_to_sacom(sc, cmd, *(int *)data); 763 break; 764 765 case TIOCMGET: 766 *(int *)data = sacom_to_tiocm(sc); 767 break; 768 769 default: 770 error = EPASSTHROUGH; 771 break; 772 } 773 774 COM_UNLOCK(sc); 775 splx(s); 776 777 #ifdef COM_DEBUG 778 if (sacom_debug) 779 comstatus(sc, "comioctl "); 780 #endif 781 782 return error; 783 } 784 785 static inline void 786 sacom_schedrx(struct sacom_softc *sc) 787 { 788 789 sc->sc_rx_ready = 1; 790 791 /* Wake up the poller. */ 792 softintr_schedule(sc->sc_si); 793 } 794 795 void 796 sacom_break(struct sacom_softc *sc, int onoff) 797 { 798 799 if (onoff) 800 SET(sc->sc_cr3, CR3_BRK); 801 else 802 CLR(sc->sc_cr3, CR3_BRK); 803 804 if (!sc->sc_heldchange) { 805 if (sc->sc_tx_busy) { 806 sc->sc_heldtbc = sc->sc_tbc; 807 sc->sc_tbc = 0; 808 sc->sc_heldchange = 1; 809 } else 810 sacom_loadchannelregs(sc); 811 } 812 } 813 814 void 815 sacom_modem(struct sacom_softc *sc, int onoff) 816 { 817 if (!sc->sc_heldchange) { 818 if (sc->sc_tx_busy) { 819 sc->sc_heldtbc = sc->sc_tbc; 820 sc->sc_tbc = 0; 821 sc->sc_heldchange = 1; 822 } else 823 sacom_loadchannelregs(sc); 824 } 825 } 826 827 void 828 tiocm_to_sacom(struct sacom_softc *sc, u_long how, int ttybits) 829 { 830 } 831 832 int 833 sacom_to_tiocm(struct sacom_softc *sc) 834 { 835 int ttybits = 0; 836 837 if (sc->sc_cr3 != 0) 838 SET(ttybits, TIOCM_LE); 839 840 return ttybits; 841 } 842 843 static u_int 844 cflag2cr0(tcflag_t cflag) 845 { 846 u_int cr0; 847 848 cr0 = (cflag & PARENB) ? CR0_PE : 0; 849 cr0 |= (cflag & PARODD) ? 0 : CR0_OES; 850 cr0 |= (cflag & CSTOPB) ? CR0_SBS : 0; 851 cr0 |= ((cflag & CSIZE) == CS8) ? CR0_DSS : 0; 852 853 return cr0; 854 } 855 856 int 857 sacomparam(struct tty *tp, struct termios *t) 858 { 859 struct sacom_softc *sc = device_lookup(&sacom_cd, COMUNIT(tp->t_dev)); 860 int ospeed = SACOMSPEED(t->c_ospeed); 861 u_int cr0; 862 int s; 863 864 if (COM_ISALIVE(sc) == 0) 865 return EIO; 866 867 /* Check requested parameters. */ 868 if (ospeed < 0) 869 return EINVAL; 870 if (t->c_ispeed && t->c_ispeed != t->c_ospeed) 871 return EINVAL; 872 873 /* 874 * For the console, always force CLOCAL and !HUPCL, so that the port 875 * is always active. 876 */ 877 if (ISSET(sc->sc_swflags, TIOCFLAG_SOFTCAR) || 878 ISSET(sc->sc_hwflags, COM_HW_CONSOLE)) { 879 SET(t->c_cflag, CLOCAL); 880 CLR(t->c_cflag, HUPCL); 881 } 882 883 /* 884 * If there were no changes, don't do anything. This avoids dropping 885 * input and improves performance when all we did was frob things like 886 * VMIN and VTIME. 887 */ 888 if (tp->t_ospeed == t->c_ospeed && 889 tp->t_cflag == t->c_cflag) 890 return 0; 891 892 cr0 = cflag2cr0(t->c_cflag); 893 894 s = splserial(); 895 COM_LOCK(sc); 896 897 sc->sc_cr0 = cr0; 898 899 sc->sc_speed = ospeed; 900 901 /* And copy to tty. */ 902 tp->t_ispeed = 0; 903 tp->t_ospeed = t->c_ospeed; 904 tp->t_cflag = t->c_cflag; 905 906 if (!sc->sc_heldchange) { 907 if (sc->sc_tx_busy) { 908 sc->sc_heldtbc = sc->sc_tbc; 909 sc->sc_tbc = 0; 910 sc->sc_heldchange = 1; 911 } else 912 sacom_loadchannelregs(sc); 913 } 914 915 if (!ISSET(t->c_cflag, CHWFLOW)) { 916 /* Disable the high water mark. */ 917 if (ISSET(sc->sc_rx_flags, RX_TTY_OVERFLOWED)) { 918 CLR(sc->sc_rx_flags, RX_TTY_OVERFLOWED); 919 sacom_schedrx(sc); 920 } 921 if (ISSET(sc->sc_rx_flags, RX_TTY_BLOCKED|RX_IBUF_BLOCKED)) { 922 CLR(sc->sc_rx_flags, RX_TTY_BLOCKED|RX_IBUF_BLOCKED); 923 sacom_hwiflow(sc); 924 } 925 } 926 927 COM_UNLOCK(sc); 928 splx(s); 929 930 (void) (*tp->t_linesw->l_modem)(tp, 1); 931 932 #ifdef COM_DEBUG 933 if (sacom_debug) 934 comstatus(sc, "comparam "); 935 #endif 936 937 return 0; 938 } 939 940 void 941 sacom_iflush(struct sacom_softc *sc) 942 { 943 bus_space_tag_t iot = sc->sc_iot; 944 bus_space_handle_t ioh = sc->sc_ioh; 945 #ifdef DIAGNOSTIC 946 int reg; 947 #endif 948 int timo; 949 950 #ifdef DIAGNOSTIC 951 reg = 0xffff; 952 #endif 953 timo = 50; 954 /* flush any pending I/O */ 955 if (sc->sc_cr3 & CR3_RXE) { 956 while (ISSET(bus_space_read_4(iot, ioh, SACOM_SR1), SR1_RNE) 957 && --timo) 958 #ifdef DIAGNOSTIC 959 reg = 960 #else 961 (void) 962 #endif 963 bus_space_read_4(iot, ioh, SACOM_DR); 964 } 965 #if 0 966 /* XXX is it good idea to wait TX finish? */ 967 if (sc->sc_cr3 & CR3_TXE) { 968 timo = 500; 969 while (ISSET(bus_space_read_4(iot, ioh, SACOM_SR1), SR1_TBY) 970 && --timo) 971 delay(100); 972 } 973 #endif 974 #ifdef DIAGNOSTIC 975 if (!timo) 976 printf("%s: sacom_iflush timeout %02x\n", sc->sc_dev.dv_xname, 977 reg); 978 #endif 979 } 980 981 void 982 sacom_loadchannelregs(struct sacom_softc *sc) 983 { 984 bus_space_tag_t iot = sc->sc_iot; 985 bus_space_handle_t ioh = sc->sc_ioh; 986 987 /* XXXXX necessary? */ 988 sacom_iflush(sc); 989 990 /* Need to stop engines first. */ 991 bus_space_write_4(iot, ioh, SACOM_CR3, 0); 992 993 bus_space_write_4(iot, ioh, SACOM_CR1, sc->sc_speed >> 8); 994 bus_space_write_4(iot, ioh, SACOM_CR2, sc->sc_speed & 0xff); 995 996 bus_space_write_4(iot, ioh, SACOM_CR0, sc->sc_cr0); 997 bus_space_write_4(iot, ioh, SACOM_CR3, sc->sc_cr3); 998 } 999 1000 int 1001 sacomhwiflow(struct tty *tp, int block) 1002 { 1003 #if 0 1004 struct sacom_softc *sc = device_lookup(&sacom_cd, COMUNIT(tp->t_dev)); 1005 int s; 1006 1007 if (COM_ISALIVE(sc) == 0) 1008 return 0; 1009 1010 if (sc->sc_mcr_rts == 0) 1011 return 0; 1012 1013 s = splserial(); 1014 COM_LOCK(sc); 1015 1016 if (block) { 1017 if (!ISSET(sc->sc_rx_flags, RX_TTY_BLOCKED)) { 1018 SET(sc->sc_rx_flags, RX_TTY_BLOCKED); 1019 sacom_hwiflow(sc); 1020 } 1021 } else { 1022 if (ISSET(sc->sc_rx_flags, RX_TTY_OVERFLOWED)) { 1023 CLR(sc->sc_rx_flags, RX_TTY_OVERFLOWED); 1024 sacom_schedrx(sc); 1025 } 1026 if (ISSET(sc->sc_rx_flags, RX_TTY_BLOCKED)) { 1027 CLR(sc->sc_rx_flags, RX_TTY_BLOCKED); 1028 sacom_hwiflow(sc); 1029 } 1030 } 1031 1032 COM_UNLOCK(sc); 1033 splx(s); 1034 #endif 1035 return 1; 1036 } 1037 1038 /* 1039 * (un)block input via hw flowcontrol 1040 */ 1041 void 1042 sacom_hwiflow(struct sacom_softc *sc) 1043 { 1044 #if 0 1045 bus_space_tag_t iot = sc->sc_iot; 1046 bus_space_handle_t ioh = sc->sc_ioh; 1047 1048 /* XXX implement */ 1049 #endif 1050 } 1051 1052 1053 void 1054 sacomstart(struct tty *tp) 1055 { 1056 struct sacom_softc *sc = device_lookup(&sacom_cd, COMUNIT(tp->t_dev)); 1057 bus_space_tag_t iot = sc->sc_iot; 1058 bus_space_handle_t ioh = sc->sc_ioh; 1059 int s; 1060 1061 if (COM_ISALIVE(sc) == 0) 1062 return; 1063 1064 s = spltty(); 1065 if (ISSET(tp->t_state, TS_BUSY | TS_TIMEOUT | TS_TTSTOP)) 1066 goto out; 1067 if (!ttypull(tp)) 1068 goto out; 1069 1070 /* Grab the first contiguous region of buffer space. */ 1071 { 1072 u_char *tba; 1073 int tbc; 1074 1075 tba = tp->t_outq.c_cf; 1076 tbc = ndqb(&tp->t_outq, 0); 1077 1078 (void)splserial(); 1079 COM_LOCK(sc); 1080 1081 sc->sc_tba = tba; 1082 sc->sc_tbc = tbc; 1083 } 1084 1085 SET(tp->t_state, TS_BUSY); 1086 sc->sc_tx_busy = 1; 1087 1088 /* Enable transmit completion interrupts if necessary. */ 1089 if (!ISSET(sc->sc_cr3, CR3_TIE)) { 1090 SET(sc->sc_cr3, CR3_TIE); 1091 bus_space_write_4(iot, ioh, SACOM_CR3, sc->sc_cr3); 1092 } 1093 1094 /* Output the first chunk of the contiguous buffer. */ 1095 sacom_filltx(sc); 1096 1097 COM_UNLOCK(sc); 1098 out: 1099 splx(s); 1100 return; 1101 } 1102 1103 void 1104 sacom_filltx(struct sacom_softc *sc) 1105 { 1106 bus_space_tag_t iot = sc->sc_iot; 1107 bus_space_handle_t ioh = sc->sc_ioh; 1108 int c, n; 1109 1110 n = 0; 1111 while (bus_space_read_4(iot, ioh, SACOM_SR1) & SR1_TNF) { 1112 if (n == SACOM_TXFIFOLEN || n == sc->sc_tbc) 1113 break; 1114 c = *(sc->sc_tba + n); 1115 c &= 0xff; 1116 bus_space_write_4(iot, ioh, SACOM_DR, c); 1117 n++; 1118 } 1119 sc->sc_tbc -= n; 1120 sc->sc_tba += n; 1121 } 1122 1123 /* 1124 * Stop output on a line. 1125 */ 1126 void 1127 sacomstop(struct tty *tp, int flag) 1128 { 1129 struct sacom_softc *sc = device_lookup(&sacom_cd, COMUNIT(tp->t_dev)); 1130 int s; 1131 1132 s = splserial(); 1133 COM_LOCK(sc); 1134 if (ISSET(tp->t_state, TS_BUSY)) { 1135 /* Stop transmitting at the next chunk. */ 1136 sc->sc_tbc = 0; 1137 sc->sc_heldtbc = 0; 1138 if (!ISSET(tp->t_state, TS_TTSTOP)) 1139 SET(tp->t_state, TS_FLUSH); 1140 } 1141 COM_UNLOCK(sc); 1142 splx(s); 1143 } 1144 1145 static inline void 1146 sacom_rxsoft(struct sacom_softc *sc, struct tty *tp) 1147 { 1148 int (*rint)(int, struct tty *) = tp->t_linesw->l_rint; 1149 u_char *get, *end; 1150 u_int cc, scc; 1151 u_char sr1; 1152 int code; 1153 int s; 1154 1155 end = sc->sc_ebuf; 1156 get = sc->sc_rbget; 1157 scc = cc = SACOM_RING_SIZE - sc->sc_rbavail; 1158 1159 while (cc) { 1160 code = get[0]; 1161 sr1 = get[1]; 1162 if (ISSET(sr1, SR1_FRE)) 1163 SET(code, TTY_FE); 1164 if (ISSET(sr1, SR1_PRE)) 1165 SET(code, TTY_PE); 1166 if ((*rint)(code, tp) == -1) { 1167 /* 1168 * The line discipline's buffer is out of space. 1169 */ 1170 if (!ISSET(sc->sc_rx_flags, RX_TTY_BLOCKED)) { 1171 /* 1172 * We're either not using flow control, or the 1173 * line discipline didn't tell us to block for 1174 * some reason. Either way, we have no way to 1175 * know when there's more space available, so 1176 * just drop the rest of the data. 1177 */ 1178 get += cc << 1; 1179 if (get >= end) 1180 get -= SACOM_RING_SIZE << 1; 1181 cc = 0; 1182 } else { 1183 /* 1184 * Don't schedule any more receive processing 1185 * until the line discipline tells us there's 1186 * space available (through comhwiflow()). 1187 * Leave the rest of the data in the input 1188 * buffer. 1189 */ 1190 SET(sc->sc_rx_flags, RX_TTY_OVERFLOWED); 1191 } 1192 break; 1193 } 1194 get += 2; 1195 if (get >= end) 1196 get = sc->sc_rbuf; 1197 cc--; 1198 } 1199 1200 if (cc != scc) { 1201 sc->sc_rbget = get; 1202 s = splserial(); 1203 COM_LOCK(sc); 1204 1205 cc = sc->sc_rbavail += scc - cc; 1206 /* Buffers should be ok again, release possible block. */ 1207 if (cc >= 1) { 1208 if (ISSET(sc->sc_rx_flags, RX_IBUF_OVERFLOWED)) { 1209 CLR(sc->sc_rx_flags, RX_IBUF_OVERFLOWED); 1210 SET(sc->sc_cr3, CR3_RIE); 1211 bus_space_write_4(sc->sc_iot, sc->sc_ioh, 1212 SACOM_CR3, sc->sc_cr3); 1213 } 1214 } 1215 COM_UNLOCK(sc); 1216 splx(s); 1217 } 1218 } 1219 1220 static inline void 1221 sacom_txsoft(struct sacom_softc *sc, struct tty *tp) 1222 { 1223 1224 CLR(tp->t_state, TS_BUSY); 1225 if (ISSET(tp->t_state, TS_FLUSH)) 1226 CLR(tp->t_state, TS_FLUSH); 1227 else 1228 ndflush(&tp->t_outq, (int)(sc->sc_tba - tp->t_outq.c_cf)); 1229 (*tp->t_linesw->l_start)(tp); 1230 } 1231 1232 static inline void 1233 sacom_stsoft(struct sacom_softc *sc, struct tty *tp) 1234 { 1235 } 1236 1237 void 1238 sacomsoft(void *arg) 1239 { 1240 struct sacom_softc *sc = arg; 1241 struct tty *tp; 1242 1243 if (COM_ISALIVE(sc) == 0) 1244 return; 1245 1246 tp = sc->sc_tty; 1247 1248 if (sc->sc_rx_ready) { 1249 sc->sc_rx_ready = 0; 1250 sacom_rxsoft(sc, tp); 1251 } 1252 1253 if (sc->sc_st_check) { 1254 sc->sc_st_check = 0; 1255 sacom_stsoft(sc, tp); 1256 } 1257 1258 if (sc->sc_tx_done) { 1259 sc->sc_tx_done = 0; 1260 sacom_txsoft(sc, tp); 1261 } 1262 } 1263 1264 int 1265 sacomintr(void *arg) 1266 { 1267 struct sacom_softc *sc = arg; 1268 bus_space_tag_t iot = sc->sc_iot; 1269 bus_space_handle_t ioh = sc->sc_ioh; 1270 u_char *put, *end; 1271 u_int cc; 1272 u_int sr0, sr1; 1273 1274 if (COM_ISALIVE(sc) == 0) 1275 return 0; 1276 1277 COM_LOCK(sc); 1278 sr0 = bus_space_read_4(iot, ioh, SACOM_SR0); 1279 if (!sr0) { 1280 COM_UNLOCK(sc); 1281 return 0; 1282 } 1283 if (ISSET(sr0, SR0_EIF)) 1284 /* XXX silently discard error bits */ 1285 bus_space_read_4(iot, ioh, SACOM_DR); 1286 if (ISSET(sr0, SR0_RBB)) 1287 bus_space_write_4(iot, ioh, SACOM_SR0, SR0_RBB); 1288 if (ISSET(sr0, SR0_REB)) { 1289 bus_space_write_4(iot, ioh, SACOM_SR0, SR0_REB); 1290 #if defined(DDB) || defined(KGDB) 1291 #ifndef DDB_BREAK_CHAR 1292 if (ISSET(sc->sc_hwflags, COM_HW_CONSOLE)) { 1293 console_debugger(); 1294 } 1295 #endif 1296 #endif /* DDB || KGDB */ 1297 } 1298 1299 1300 end = sc->sc_ebuf; 1301 put = sc->sc_rbput; 1302 cc = sc->sc_rbavail; 1303 1304 sr1 = bus_space_read_4(iot, ioh, SACOM_SR1); 1305 if (ISSET(sr0, SR0_RFS | SR0_RID)) { 1306 if (!ISSET(sc->sc_rx_flags, RX_IBUF_OVERFLOWED)) { 1307 while (cc > 0) { 1308 if (!ISSET(sr1, SR1_RNE)) { 1309 bus_space_write_4(iot, ioh, SACOM_SR0, 1310 SR0_RID); 1311 break; 1312 } 1313 put[0] = bus_space_read_4(iot, ioh, SACOM_DR); 1314 put[1] = sr1; 1315 #if defined(DDB) && defined(DDB_BREAK_CHAR) 1316 if (put[0] == DDB_BREAK_CHAR && 1317 ISSET(sc->sc_hwflags, COM_HW_CONSOLE)) { 1318 console_debugger(); 1319 1320 sr1 = bus_space_read_4(iot, ioh, SACOM_SR1); 1321 continue; 1322 } 1323 #endif 1324 put += 2; 1325 if (put >= end) 1326 put = sc->sc_rbuf; 1327 cc--; 1328 1329 sr1 = bus_space_read_4(iot, ioh, SACOM_SR1); 1330 } 1331 1332 /* 1333 * Current string of incoming characters ended because 1334 * no more data was available or we ran out of space. 1335 * Schedule a receive event if any data was received. 1336 * If we're out of space, turn off receive interrupts. 1337 */ 1338 sc->sc_rbput = put; 1339 sc->sc_rbavail = cc; 1340 if (!ISSET(sc->sc_rx_flags, RX_TTY_OVERFLOWED)) 1341 sc->sc_rx_ready = 1; 1342 1343 /* XXX do RX hardware flow control */ 1344 1345 /* 1346 * If we're out of space, disable receive interrupts 1347 * until the queue has drained a bit. 1348 */ 1349 if (!cc) { 1350 SET(sc->sc_rx_flags, RX_IBUF_OVERFLOWED); 1351 CLR(sc->sc_cr3, CR3_RIE); 1352 bus_space_write_4(iot, ioh, SACOM_CR3, 1353 sc->sc_cr3); 1354 } 1355 } else { 1356 #ifdef DIAGNOSTIC 1357 panic("sacomintr: we shouldn't reach here"); 1358 #endif 1359 CLR(sc->sc_cr3, CR3_RIE); 1360 bus_space_write_4(iot, ioh, SACOM_CR3, sc->sc_cr3); 1361 } 1362 } 1363 1364 /* 1365 * Done handling any receive interrupts. See if data can be 1366 * transmitted as well. Schedule tx done event if no data left 1367 * and tty was marked busy. 1368 */ 1369 sr0 = bus_space_read_4(iot, ioh, SACOM_SR0); 1370 if (ISSET(sr0, SR0_TFS)) { 1371 /* 1372 * If we've delayed a parameter change, do it now, and restart 1373 * output. 1374 * XXX sacom_loadchannelregs() waits TX completion, 1375 * XXX resulting in ~0.1s hang (300bps, 4 bytes) in worst case 1376 */ 1377 if (sc->sc_heldchange) { 1378 sacom_loadchannelregs(sc); 1379 sc->sc_heldchange = 0; 1380 sc->sc_tbc = sc->sc_heldtbc; 1381 sc->sc_heldtbc = 0; 1382 } 1383 1384 /* Output the next chunk of the contiguous buffer, if any. */ 1385 if (sc->sc_tbc > 0) { 1386 sacom_filltx(sc); 1387 } else { 1388 /* Disable transmit completion interrupts if necessary. */ 1389 if (ISSET(sc->sc_cr3, CR3_TIE)) { 1390 CLR(sc->sc_cr3, CR3_TIE); 1391 bus_space_write_4(iot, ioh, SACOM_CR3, 1392 sc->sc_cr3); 1393 } 1394 if (sc->sc_tx_busy) { 1395 sc->sc_tx_busy = 0; 1396 sc->sc_tx_done = 1; 1397 } 1398 } 1399 } 1400 COM_UNLOCK(sc); 1401 1402 /* Wake up the poller. */ 1403 softintr_schedule(sc->sc_si); 1404 1405 #if NRND > 0 && defined(RND_COM) 1406 rnd_add_uint32(&sc->rnd_source, iir | lsr); 1407 #endif 1408 return 1; 1409 } 1410 1411 static void 1412 sacom_j720_init(struct sa11x0_softc *parent, struct sacom_softc *sc) { 1413 1414 /* XXX this should be done at sc->enable function */ 1415 bus_space_write_4(parent->sc_iot, parent->sc_gpioh, 1416 SAGPIO_PCR, 0xa0000); 1417 bus_space_write_4(parent->sc_iot, parent->sc_gpioh, 1418 SAGPIO_PSR, 0x100); 1419 } 1420 1421 /* Initialization for serial console */ 1422 int 1423 sacominit(bus_space_tag_t iot, bus_addr_t iobase, int baud, tcflag_t cflag, 1424 bus_space_handle_t *iohp) 1425 { 1426 int brd, cr0; 1427 1428 if (bus_space_map(iot, iobase, SACOM_NPORTS, 0, iohp)) 1429 printf("register map failed\n"); 1430 1431 /* wait for the Tx queue to drain and disable the UART */ 1432 while (bus_space_read_4(iot, *iohp, SACOM_SR1) & SR1_TBY) 1433 continue; 1434 bus_space_write_4(iot, *iohp, SACOM_CR3, 0); 1435 1436 cr0 = cflag2cr0(cflag); 1437 bus_space_write_4(iot, *iohp, SACOM_CR0, cr0); 1438 1439 brd = SACOMSPEED(baud); 1440 sacomconsrate = baud; 1441 sacomconsaddr = iobase; 1442 sacomconscflag = cflag; 1443 /* XXX assumes little endian */ 1444 bus_space_write_4(iot, *iohp, SACOM_CR1, brd >> 8); 1445 bus_space_write_4(iot, *iohp, SACOM_CR2, brd & 0xff); 1446 1447 /* enable the UART */ 1448 bus_space_write_4(iot, *iohp, SACOM_CR3, CR3_RXE | CR3_TXE); 1449 1450 return 0; 1451 } 1452 1453 void 1454 sacomcnprobe(struct consdev *cp) 1455 { 1456 cp->cn_pri = CN_REMOTE; 1457 } 1458 1459 void 1460 sacomcninit(struct consdev *cp) 1461 { 1462 if (cp == NULL) { 1463 /* XXX cp == NULL means that MMU is disabled. */ 1464 sacomconsioh = SACOM3_BASE; 1465 sacomconstag = &sa11x0_bs_tag; 1466 cn_tab = &sacomcons; 1467 return; 1468 } 1469 1470 if (sacominit(&sa11x0_bs_tag, CONADDR, CONSPEED, 1471 CONMODE, &sacomconsioh)) 1472 panic("can't init serial console @%x", CONADDR); 1473 cn_tab = &sacomcons; 1474 sacomconstag = &sa11x0_bs_tag; 1475 } 1476 1477 int 1478 sacomcngetc(dev_t dev) 1479 { 1480 int c, s; 1481 1482 s = spltty(); /* XXX do we need this? */ 1483 1484 while (!(bus_space_read_4(sacomconstag, sacomconsioh, SACOM_SR1) 1485 & SR1_RNE)) { 1486 #if defined(DDB) || defined(KGDB) 1487 #ifndef DDB_BREAK_CHAR 1488 u_int sr0; 1489 extern int db_active; 1490 1491 sr0 = bus_space_read_4(sacomconstag, sacomconsioh, SACOM_SR0); 1492 if (ISSET(sr0, SR0_RBB)) 1493 bus_space_write_4(sacomconstag, sacomconsioh, 1494 SACOM_SR0, SR0_RBB); 1495 if (ISSET(sr0, SR0_REB)) { 1496 bus_space_write_4(sacomconstag, sacomconsioh, 1497 SACOM_SR0, SR0_REB); 1498 if (db_active == 0) 1499 console_debugger(); 1500 } 1501 #endif 1502 #endif /* DDB || KGDB */ 1503 } 1504 1505 c = bus_space_read_4(sacomconstag, sacomconsioh, SACOM_DR); 1506 c &= 0xff; 1507 splx(s); 1508 1509 return c; 1510 } 1511 1512 void 1513 sacomcnputc(dev_t dev, int c) 1514 { 1515 int s; 1516 1517 s = spltty(); /* XXX do we need this? */ 1518 1519 while (!(bus_space_read_4(sacomconstag, sacomconsioh, SACOM_SR1) 1520 & SR1_TNF)) 1521 continue; 1522 1523 bus_space_write_4(sacomconstag, sacomconsioh, SACOM_DR, c); 1524 splx(s); 1525 } 1526 1527 void 1528 sacomcnpollc(dev_t dev, int on) 1529 { 1530 1531 } 1532 1533 #if 0 1534 #ifdef DEBUG 1535 int 1536 sacomcncharpoll(void) 1537 { 1538 int c; 1539 1540 if (!(bus_space_read_4(sacomconstag, sacomconsioh, SACOM_SR1) 1541 & SR1_RNE)) 1542 return -1; 1543 1544 c = bus_space_read_4(sacomconstag, sacomconsioh, SACOM_DR); 1545 c &= 0xff; 1546 1547 return c; 1548 } 1549 #endif 1550 #endif 1551 1552 /* helper function to identify the com ports used by 1553 console or KGDB (and not yet autoconf attached) */ 1554 int 1555 sacom_is_console(bus_space_tag_t iot, bus_addr_t iobase, 1556 bus_space_handle_t *ioh) 1557 { 1558 bus_space_handle_t help; 1559 1560 if (!sacomconsattached && 1561 iot == sacomconstag && iobase == sacomconsaddr) 1562 help = sacomconsioh; 1563 else 1564 return 0; 1565 1566 if (ioh) 1567 *ioh = help; 1568 return 1; 1569 } 1570
Indexes created Thu Oct 02 10:09:58 GMT 2025